/*

 * Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

package jdk.nashorn.internal.runtime.arrays;

import jdk.nashorn.internal.runtime.ScriptObject;

/**

 * Reverse iterator over a NativeArray

 */

final class ReverseScriptArrayIterator extends ScriptArrayIterator {

    /**

     * Constructor

     * @param array array to iterate over

     * @param includeUndefined should undefined elements be included in iteration

     */

    public ReverseScriptArrayIterator(final ScriptObject array, final boolean includeUndefined) {

        super(array, includeUndefined);

        this.index = array.getArray().length() - 1;

    }

    @Override

    public boolean isReverse() {

        return true;

    }

    @Override

    protected boolean indexInArray() {

        return index >= 0;

    }

    @Override

    protected long bumpIndex() {

        return index--;

    }

}